642444874370 has 64 divisors (see below), whose sum is σ = 1289814714720. Its totient is φ = 228761100288.

The previous prime is 642444874327. The next prime is 642444874517. The reversal of 642444874370 is 73478444246.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 3227035249 + 639217839121 = 56807^2 + 799511^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3115922 + ... + 3315698.

Almost surely, 2^642444874370 is an apocalyptic number.

642444874370 is an abundant number, since it is smaller than the sum of its proper divisors (647369840350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642444874370 is a wasteful number, since it uses less digits than its factorization.

642444874370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200679.

The product of its (nonzero) digits is 14450688, while the sum is 53.

The spelling of 642444874370 in words is "six hundred forty-two billion, four hundred forty-four million, eight hundred seventy-four thousand, three hundred seventy".